.AC3 | Various Developers | 音频文件 | Audio Codec 3 File | Microsoft Windows Media Player | Microsoft Corporation |
.ADPCM | Microsoft Corporation | 音频文件 | ADPCM Audio | Microsoft Windows Media Player | Microsoft Corporation |
.ADT | Swiftpage, Inc. | 数据文件 | ACT! Document Template | Microsoft Windows Media Player | Microsoft Corporation |
.ADTS | Shedworx | 音频文件 | Audio Data Transport Stream File | Microsoft Windows Media Player | Microsoft Corporation |
.AIF | Apple | 音频文件 | Audio Interchange File Format | Microsoft Windows Media Player | Microsoft Corporation |
.AIFC | Apple | 音频文件 | Compressed Audio Interchange File | Microsoft Windows Media Player | Microsoft Corporation |
.AIFF | Apple | 音频文件 | Audio Interchange File Format | Microsoft Windows Media Player | Microsoft Corporation |
.APL | Matthew T. Ashland | 音频文件 | Monkey's Audio Track Information File | Microsoft Windows Media Player | Microsoft Corporation |
.ASF | Microsoft Corporation | 视频文件 | Advanced Systems Format File | Microsoft Windows Media Player | Microsoft Corporation |
.ASX | Microsoft Corporation | 视频文件 | Microsoft ASF Redirector File | Microsoft Windows Media Player | Microsoft Corporation |
.AU | Open Source | 音频文件 | Audacity Audio File | Microsoft Windows Media Player | Microsoft Corporation |
.AVI | Microsoft Corporation | 视频文件 | Audio Video Interleave File | Microsoft Windows Media Player | Microsoft Corporation |
.AX | Open Source | 插件文件 | DirectShow Filter | Microsoft Windows Media Player | Microsoft Corporation |